Bleh, I bought a new video card about 2 months ago, a 460 SE, and I was happy with it until I jumped onto this band wagon

I really don't like how underperforming it is compared to a 5850, a card which is maybe $20 more than I spent for this thing. 

Thus, I'm thinking of upgrading; I want to know what is the nVidia equivalent, however, as I've had nothing but bad experiences with ATi recently.